<template>
  <div class="app-container">

    <!-- 顶部 Header 区域 -->
    <mt-header fixed title="黑马程序员·Vue项目">
      <span slot="left" @click="goBack" v-show="flag">
        <mt-button icon="back">返回</mt-button>
      </span>
    </mt-header>

    <!-- 中间的 路由 router-view 区域 -->
    <transition>
      <router-view></router-view>
    </transition>


    <!-- 底部的 Tabbar 区域 -->
    <nav class="mui-bar mui-bar-tab">
			<router-link class="mui-tab-item-ltt" to="/home">
				<span class="mui-icon mui-icon-home"></span>
				<span class="mui-tab-label">首页</span>
			</router-link>
			<router-link class="mui-tab-item-ltt" to="/member">
				<span class="mui-icon mui-icon-contact"></span>
				<span class="mui-tab-label">会员</span>
			</router-link>
			<router-link class="mui-tab-item-ltt" to="/shopcar">
				<span class="mui-icon mui-icon-extra mui-icon-extra-cart"><span class="mui-badge" id="badge">{{ $store.getters.getAllCount }}</span></span>
				<span class="mui-tab-label">购物车</span>
			</router-link>
			<router-link class="mui-tab-item-ltt" to="/search">
				<span class="mui-icon mui-icon-search"></span>
				<span class="mui-tab-label">搜索</span>
			</router-link>
		</nav>


  </div>
</template>

<script>
export default{
  data() {
    return {
      flag:false
    }
  }, 
  created(){
    this.flag=this.$route.path==="/home"?false:true;
  },
  methods: {
    goBack(){
      //点击后退
      this.$router.go(-1)
    }
  },
  watch:{
    '$route.path':function (newVal) {
        if(newVal==='/home'){
          this.flag=false
        }else{
          this.flag=true
        }
    }
  }
}
</script>

<style lang="scss" scoped>
.mint-header{
  z-index: 99;
}
.app-container{
  padding-top:40px; 
  padding-bottom:50px; 
  overflow-x: hidden;
}

.v-enter{
  opacity: 0;
  transform: translateX(100%);
}

.v-leave-to{
    opacity: 0;
  transform: translateX(-100%);
  position: absolute;
}

.v-enter-active,
.v-leave-active{
  transition: all 0.5s ease;
}

//改类名,解决 tabbar 点击无法切换的问题
.mui-bar-tab .mui-tab-item-ltt.mui-active {
    color: #007aff;
}
.mui-bar-tab .mui-tab-item-ltt {
    display: table-cell;
    overflow: hidden;
    width: 1%;
    height: 50px;
    text-align: center;
    vertical-align: middle;
    white-space: nowrap;
    text-overflow: ellipsis;
    color: #929292;
}
.mui-bar-tab .mui-tab-item-ltt .mui-icon {
    top: 3px;
    width: 24px;
    height: 24px;
    padding-top: 0;
    padding-bottom: 0;
}
.mui-bar-tab .mui-tab-item-ltt .mui-icon~.mui-tab-label {
    font-size: 11px;
    display: block;
    overflow: hidden;
    text-overflow: ellipsis;
}
</style>

